aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/usb/gadget/ci13xxx_udc.h
blob: a2492b65f98c41a3b57e795c546f73eb6b551d46 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
/*
 * ci13xxx_udc.h - structures, registers, and macros MIPS USB IP core
 *
 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
 *
 * Author: David Lopo
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Description: MIPS USB IP core family device controller
 *              Structures, registers and logging macros
 */

#ifndef _CI13XXX_h_
#define _CI13XXX_h_

/******************************************************************************
 * DEFINE
 *****************************************************************************/
#define CI13XXX_PAGE_SIZE  4096ul /* page size for TD's */
#define ENDPT_MAX          (32)
#define CTRL_PAYLOAD_MAX   (64)
#define RX        (0)  /* similar to USB_DIR_OUT but can be used as an index */
#define TX        (1)  /* similar to USB_DIR_IN  but can be used as an index */

/******************************************************************************
 * STRUCTURES
 *****************************************************************************/
/* DMA layout of transfer descriptors */
struct ci13xxx_td {
	/* 0 */
	u32 next;
#define TD_TERMINATE          BIT(0)
	/* 1 */
	u32 token;
#define TD_STATUS             (0x00FFUL <<  0)
#define TD_STATUS_TR_ERR      BIT(3)
#define TD_STATUS_DT_ERR      BIT(5)
#define TD_STATUS_HALTED      BIT(6)
#define TD_STATUS_ACTIVE      BIT(7)
#define TD_MULTO              (0x0003UL << 10)
#define TD_IOC                BIT(15)
#define TD_TOTAL_BYTES        (0x7FFFUL << 16)
	/* 2 */
	u32 page[5];
#define TD_CURR_OFFSET        (0x0FFFUL <<  0)
#define TD_FRAME_NUM          (0x07FFUL <<  0)
#define TD_RESERVED_MASK      (0x0FFFUL <<  0)
} __attribute__ ((packed));

/* DMA layout of queue heads */
struct ci13xxx_qh {
	/* 0 */
	u32 cap;
#define QH_IOS                BIT(15)
#define QH_MAX_PKT            (0x07FFUL << 16)
#define QH_ZLT                BIT(29)
#define QH_MULT               (0x0003UL << 30)
	/* 1 */
	u32 curr;
	/* 2 - 8 */
	struct ci13xxx_td        td;
	/* 9 */
	u32 RESERVED;
	struct usb_ctrlrequest   setup;
} __attribute__ ((packed));

/* Extension of usb_request */
struct ci13xxx_req {
	struct usb_request   req;
	unsigned             map;
	struct list_head     queue;
	struct ci13xxx_td   *ptr;
	dma_addr_t           dma;
};

/* Extension of usb_ep */
struct ci13xxx_ep {
	struct usb_ep                          ep;
	const struct usb_endpoint_descriptor  *desc;
	u8                                     dir;
	u8                                     num;
	u8                                     type;
	char                                   name[16];
	struct {
		struct list_head   queue;
		struct ci13xxx_qh *ptr;
		dma_addr_t         dma;
	}                                      qh;
	int                                    wedge;

	/* global resources */
	spinlock_t                            *lock;
	struct device                         *device;
	struct dma_pool                       *td_pool;
};

struct ci13xxx;
struct ci13xxx_udc_driver {
	const char	*name;
	unsigned long	 flags;
#define CI13XXX_REGS_SHARED		BIT(0)
#define CI13XXX_REQUIRE_TRANSCEIVER	BIT(1)
#define CI13XXX_PULLUP_ON_VBUS		BIT(2)
#define CI13XXX_DISABLE_STREAMING	BIT(3)

#define CI13XXX_CONTROLLER_RESET_EVENT		0
#define CI13XXX_CONTROLLER_STOPPED_EVENT	1
	void	(*notify_event) (struct ci13xxx *udc, unsigned event);
};

/* CI13XXX UDC descriptor & global resources */
struct ci13xxx {
	spinlock_t		  *lock;      /* ctrl register bank access */
	void __iomem              *regs;      /* registers address space */

	struct dma_pool           *qh_pool;   /* DMA pool for queue heads */
	struct dma_pool           *td_pool;   /* DMA pool for transfer descs */
	struct usb_request        *status;    /* ep0 status request */

	struct usb_gadget          gadget;     /* USB slave device */
	struct ci13xxx_ep          ci13xxx_ep[ENDPT_MAX]; /* extended endpts */
	u32                        ep0_dir;    /* ep0 direction */
#define ep0out ci13xxx_ep[0]
#define ep0in  ci13xxx_ep[16]

	struct usb_gadget_driver  *driver;     /* 3rd party gadget driver */
	struct ci13xxx_udc_driver *udc_driver; /* device controller driver */
	int                        vbus_active; /* is VBUS active */
	struct otg_transceiver    *transceiver; /* Transceiver struct */
};

/******************************************************************************
 * REGISTERS
 *****************************************************************************/
/* register size */
#define REG_BITS   (32)

/* HCCPARAMS */
#define HCCPARAMS_LEN         BIT(17)

/* DCCPARAMS */
#define DCCPARAMS_DEN         (0x1F << 0)
#define DCCPARAMS_DC          BIT(7)

/* TESTMODE */
#define TESTMODE_FORCE        BIT(0)

/* USBCMD */
#define USBCMD_RS             BIT(0)
#define USBCMD_RST            BIT(1)
#define USBCMD_SUTW           BIT(13)

/* USBSTS & USBINTR */
#define USBi_UI               BIT(0)
#define USBi_UEI              BIT(1)
#define USBi_PCI              BIT(2)
#define USBi_URI              BIT(6)
#define USBi_SLI              BIT(8)

/* DEVICEADDR */
#define DEVICEADDR_USBADRA    BIT(24)
#define DEVICEADDR_USBADR     (0x7FUL << 25)

/* PORTSC */
#define PORTSC_SUSP           BIT(7)
#define PORTSC_HSP            BIT(9)
#define PORTSC_PTC            (0x0FUL << 16)

/* DEVLC */
#define DEVLC_PSPD            (0x03UL << 25)
#define    DEVLC_PSPD_HS      (0x02UL << 25)

/* USBMODE */
#define USBMODE_CM            (0x03UL <<  0)
#define    USBMODE_CM_IDLE    (0x00UL <<  0)
#define    USBMODE_CM_DEVICE  (0x02UL <<  0)
#define    USBMODE_CM_HOST    (0x03UL <<  0)
#define USBMODE_SLOM          BIT(3)
#define USBMODE_SDIS          BIT(4)

/* ENDPTCTRL */
#define ENDPTCTRL_RXS         BIT(0)
#define ENDPTCTRL_RXT         (0x03UL <<  2)
#define ENDPTCTRL_RXR         BIT(6)         /* reserved for port 0 */
#define ENDPTCTRL_RXE         BIT(7)
#define ENDPTCTRL_TXS         BIT(16)
#define ENDPTCTRL_TXT         (0x03UL << 18)
#define ENDPTCTRL_TXR         BIT(22)        /* reserved for port 0 */
#define ENDPTCTRL_TXE         BIT(23)

/******************************************************************************
 * LOGGING
 *****************************************************************************/
#define ci13xxx_printk(level, format, args...) \
do { \
	if (_udc == NULL) \
		printk(level "[%s] " format "\n", __func__, ## args); \
	else \
		dev_printk(level, _udc->gadget.dev.parent, \
			   "[%s] " format "\n", __func__, ## args); \
} while (0)

#define err(format, args...)    ci13xxx_printk(KERN_ERR, format, ## args)
#define warn(format, args...)   ci13xxx_printk(KERN_WARNING, format, ## args)
#define info(format, args...)   ci13xxx_printk(KERN_INFO, format, ## args)

#ifdef TRACE
#define trace(format, args...)      ci13xxx_printk(KERN_DEBUG, format, ## args)
#define dbg_trace(format, args...)  dev_dbg(dev, format, ##args)
#else
#define trace(format, args...)      do {} while (0)
#define dbg_trace(format, args...)  do {} while (0)
#endif

#endif	/* _CI13XXX_h_ */